Automatic phonograph stop



Sept. 29, 1931. E.. TRAUB AUTQMATIAC PHONOGRAPH sToP Filed April 14.1928 INVENTOR Em'l Qfau WITNESSI Q.

ATTORNEY Patented Sept.Y 1931 Y l n i 1 .uw nmf'lzHQNOGMm fnylipiieetielknleenpnlf 14, 1928. fse'r'ialrnogarogloaj- 5 'd n M y IThis invention .relates't'o'f bereleasedjronithe record-table underthevin devices for 1 automaticallyldontrolling the-actionrof thelever-'spring operation of. sound reproducingapparatus, ,'Operativelyconnected'lwith the? brakes such as phonographs andthe likelfll 1 leverlis ,a I1.,-,e1eotric'-current transmitting@k 5; The primary-'objectofthe inventionisto" swltchfmexnber,fpys'fhich acts to 4bridge they V552provide :an improved friction-vbiakeadapted lspaced contactamembersof-aaswitch'in an; to engage :the `circumferentialperipheryelectric-circuit;whenthe brake-lever swlngs,l

of the rotatable record-table-ofjsoilnd-reintoxreleaseaposition.`.Thiselectric-circuit. producingA apparatus, -rwhich friction-.brake mayemployed for transmitting :current`v 1o may, bysimple connections be:releasedyfrom l to aflnotor designed ,to operatefthe sound-v $6--recordftablebrakin'g position; at5fa.f- .prede.freproducingyapparatus,or yitemaybe ems.

Y termined time-under lthefcontrolling:action ployedfor an other`purpose such Ias the Y of an alarm-clockwhich may *beffof anylighting'of a; amp.` Iniits complete form," ordinary commercial t pelfwuv z the;`pres'nt v-improvement also includesadf" A further `object othisinvention-isz-to` justablemeans for automatically.swingiI1g..-esiEprovide a ,friction-brake.,ofeeths :'characterf thewbrake-'lever intoosition t0 arresto-the-y by means'offfwhich th@braking;i;im-,isinp`rotation of the recor -table by the inward-.- creased by any rotationtendencyyoffthe niovem'entfof the :tOne-arm'of; theapparatusrecord-table. 7 v ai 1;duringorat.thecompletion .of `thevplaying;

201 A still furthenobjeet .of this 'invention is f ofa recordu'pon'therecord-table. 1 Y to providemeans whereby the,"automatic-ref` 11n; theaccompanying ,drawings,` Fig. y1 leaseeof the friction-brakeycal'lsesltheclosin I is` altop-planview of a .portion of a `sound-Vv ofanielectric-.circuit which-may beernployeo-r reproduclng:apparatuS.towhich the present as a power factor'in;the.ope-rationzof theimprovement. has: been-applied, thelrecord-A25.sound-reproducing:apparatus or `forlighting table being :partlybrokenaway `adjacent 75"` a lamp, etc. Y 1 a f j in: thelibrakeslever'andthesWitCh-boxnframei: `Other objects ofthe-inventionxwillbeap: bei-ngVshown'in section. "@Fig; 2 is an: enparent kfrom 'thefollowingwdesoripti and f largedv front-end elevation, partly insection; claims. l l of theupperportionfof the apparatus, omit-Vl 30. Ina preferredembodiment: of fthe inventing the tonefarm. Figz is aside-elevation 8a tion, a friction-element carrying ffle've'rhas ofi thebrake-leverand latch-arm .-asmount? its fulcrum `Within thecircumferenceioi the"V edv upon the supporting-platetherefor.record-table andarearward ofha'record-table@ 4E is "a.rdetached:perspective ,'view"'of'the radius through the pointofengagement` of brakeslever."supporting-plate. Fig..'5 isv a` thefriction-elnentzWithfthe.cironmferenfk side viewfof thev switehwiththeboicfthere-a 8'5` y talip'erphery .0f saidl tabla-whereby any.forfshownin' section. rotationftendencyin.thelproper direction'oiiThepresent improvement is applicable to v the record tableghas theeffect of increasing any'o' the well-r known makes of sound-V thebrakingaction by Said. level'. u reproducing' apparats and. any vordinary? 40 Pivotally carried bythe brakeleverto alarm-clock#mayv beemployedH to control 90 swing about an axis transverse to.theaxis.vtherelealseofthebrake. f OfSad leVeI'S all'armwhhmyfbltched:Referring'to the drawings,-the presentv 00 110161 the'brake-lever inreeordjtable en-f improvement 'isa illustratedas applied --to a* gaging`positlon 'against--thevactin Ofeza sound'-reproducin'g apparatus"including a y spring.` The pivotal'latch-arm.isonnectedframe'f'orgcdsig. phavinggnear its upperl 951 by means `ofa*leX1blefelement,1-such as a end'fa"casing-table 2. Spaced above and'00rd, Wlth the .alarm 'wlnding-stem'of:`V aufparallel"tdthe-casing-table 2 is -a record-f alarm-clockwhereby.'theplatchfarmmay bel fableif); whih-gm'ay befsupported andoper-I eaused to be"automatieally'trippedta.pref atedin any vusualmannenVA the present. in-v determined time to permit vthebrakej-l'evexgip. y'entionvbeig Aequally;'applicable '-toffelc-; 10o

` 29. the plane of the recorc1- table5' -Therbralie` 1ever,'which1in theresent insta-nceis maden llablank, inlay: .1 be .r of anyfa suitableconstruction. and: 2 betweenits,t ends` Vxeclly carriesalfriction-element 13 innpost v 25 tion to' engage the `circurnferentialperiphery i Vdriven apparatus.

trically and mechanically operated motor- Capable of travelling acrossthe record-table is the usual soundbox 4, carried by the free end of atone-arm 5 swinging inwardly toward the axis of rotation of therecord-table during the sound-reproducing process.

ot-screw 6 is a supporting-:plate 7 provided with an arcuate slot 8entered"by*ase'clrir'xg- A screw 9, this construction providing. @rad-.justment of the supporting-plate'7"to'chan" e its angular position withrespectto 1 -recon A- table radius. The supporting-plate 7 is providedwith aithraded'aprture -10 entered-A by a pivot-screw ll constitutingthe fuloruil'l 1'.

of af brake-lever lwcapable o f swinging about its pivotal| axis'jinV a.plane 'parallel- .to

from ka sheetlmeta ment Aof the freer-mdy of the brake-leverdQ therecord-table, which Idirection isindieated i by the arrow inFig, loftliedrawngs, the

pivotal? axis 'of the brake-lever1'l2 is'ireardirection'. has `the'effect i of increasing the braking .actionv I"of the friction-element#Wear-01E the frictionselement Emay" befieadlyf taken up vby ythe before`"describedV adjust l ment of the supportinglplater. --The swi ingmovement ofthe brake-leverinfy the -d1''..

rection to:` engage "-thefrcordtable isi pref-- era'blyl `limited by-favv'stop-eari141 'upturnedi from the f. supporting-plate- 7,said-,'-stop-.alfc beingy slightly spacedftrom the bralrelevr:v

in a normal braking positionofrsaid'lever v .i `Projecting upwardly fromthe .brakeer l2 is ua Vthumbpiece lfor manually swings.;

ing the levern into brakingk ositiornl ag`fai11st-` theA actionv of v aspring 16,' secured: 'upon the.:

plate 7 and yieldingly bariiig' against the;

lever to release it.: from brakingf pos whereby the brake-levermay bereleasably latched in braking position.

Suitably connected with the free end of the latch-arm, through theintermediary of a coil-spring 19 is one end of a flexibleelement or cord20 of which the opposite endisloonnected to a crank 21; afforded bySecured" -uponthe-easingtable 2 funden'k neath the record-table 3, bymeans ofa plv-k the aalarrn-Winding stem of l an alarm-clock 22. In thepresent instance, the alarm-clock Secured uponthecasing-table 2, foradi! justment: inthe direetiox'n:ofA the brake-lever is an insulatorblockx2'5adjustably carrying spaced oontaetJmemberS, `asv .26, @theinner@ ends, as'l 27,;f .Whichrarefupturned and are*v inclinedx-withzfrespet toi-eachother. By suitablev y-brindingeposts,v these.-contact-inemf bersV areconnected-l with zcurrentleads, as 28,

of .2 an ,electric-circuit which may... constitute inggapparatusworimayfbey employed for any. otherldesired purpose, .Suitably connected 29; andan2fntermediat'a` insulatinglink 30 is a shiftableswitchI-merilberil-o-currentf conducting materiali At its end nearestthe fixed: contact`members; i. the'v switch-member.

. .'"31fi's termed-rasa;.Veshaped'bifidge 32 adapt- Considered' in lthe'directioni of 'rotation off 1 edto'isimultaneously engage.` theVupturned ends 27 of said fixed contact-members, when 'thebrakelleyerlfis vvs wu.1 1gaway from the l A recordftable': Thegswitclr-member '31 is wai-dof a radiusfthrough the point 'of enigagementof the1'friction-element-v withA the` re'cord-tablevandi-therefore. any rotation L tendenqyo'the recordtab'le in itsp'roper` sho-waas guided by spacedY pin`s,`as 33, fixed upon theinsulator-block Qfwhich ispreferably covered'bya cap-plate v '.In'ord'erto automatically swing the brakelever l2 into position to restrain therecordtable vv-vagainst :rotation-said brake-lever is connected'by-acord Y'B5-o1' thelikef with the free end of an arm 36 secured upon thevlower. endX of 'an oscillatory, verti'cally-apertured block 37,161Fixedupon the casing.' table 2': adjacent the rear end fof the tone-arm 5isla post .38 'upon whielx:tlieblocl` 37 oscillates, said;r blockycarrying r at its upper` end another 'arm '39.: i j Threaded-liuto thearm 89 is an adjustablevscrew .4Q provided with a buifer`-disk il :ofsuitableniaterial and posi tioned :tiche-engaged by the'tonesarm as thelatter swingslinwardly vin the usual manner. operationfof? thej presentdeviceis so simplefthat t'i willybe. clearly understood freinstheforegoing descriptiomj Suffice it tol mention that the brake-leverisheld in record-table engaging 'positionby the latcharm 17and'-llatclrll8ftores`ti-ain `said recordtable against -rjotaltion'iffoperatedv by 'a mechanicalmotor y'and `tomaintain an open circuit if.'o eratedibylanelectric-inotor con necteci wit\-t:hedescribed'-fswit'ehvBy setting. aInrrh.-e1ock.:.swrautomaticallytrip witlthefbrkelevers :12 by. means of a link.. in one direef'fion.vThe brakgfs'urface :eff the friction-element? is preferably".disposedfktangential to the record-table at the time-ofi engagement of the.friction-elementi therethe latch-arm at a predetermined time, the spring16 acts to release the brake-lever12 from engagement with therecord-table and thereby shifts the switch-memberl in' a direction tocause its V-shaped end to bridge the spaced contact-members 27 and closethe electric-circuit. The record-table beingnow free to rotate, thetone-armf` swings inwardly during the playing of a record and engagesthe buffer-disk 41 to swing, through the described connections,` thebrake-lever into record-table engaging position.

Having thus set forth the nature of the invention, what Iclaim hereinis: Y

1. In a sound-reproducing apparatus having a rotatable record-table, aswinging brake-lever having its pivotal axis within the circumferencekof vsaid record-table, a friction-element carried by the brake-leverpositioned to engage and release the circumferential periphery of saidtable in swinging movements of the brake-lever in opposite directions,means acting to shift said brakelever from braking to release positionsand means for releasably'latching said V brakelever in braking position.Y

2. In a sound-reproducing apparatus having a rotatable record-table, aswinging brake-lever having itsv pivotal axis within the circumferenceof said record-table, a friction-element carried by the brake-leverpositioned to engage and release the circumferential periphery of saidtable in swinging movements of the brake-lever in opposite directions,means acting automatically upon operation of the sound-reproducingapparatus for swinging said lever from release to braking positions, andymeans for releasably latching said brake-lever in braking position.

3. In a sound-reproducing` apparatus having `a rotatable record-table, abrakelever, a pivotal support for said lever, a latch-arm pivotallysupported by said lever,

i a friction-element carried by the brake-lever between its pivotalsupportand said latcharm in position to engage and release the peripheryof said record-table upon swinging movements of lthe brake-lever inopposite directions, a stop-element for holding said' latch-arm inrecord-table braking position of the brake-lever, and means' forautomatically swinging said brake-lever from braking to releasepositions upon release of said latch-arm.

4. In a sound-reproducingy apparatus having a rotatable record-table anda swinging tone-arm, a brake-lever, a pivotal support for said lever, alatch-arm pivotally supported by said lever, a friction-element carriedby the brake-lever. between its pivotal support and said latch-arm inposition to engage and release the periphery of said record-table uponswlnglng movementsV of the brake-lever in opposite directions, a

otal axis of the lever, .a friction-element carried by the brake-leverin position to engage and release the periphery of ,said record-tableupon swinging movements of the brake-lever in opposite directions, meansfor` latching said arm to hold said lever in record-table brakingposition, and a spring acting to swing said lever from braking torelease positions upon release of said latch-arm.

6..In a sound-reproducing apparatus having a rotatable record-table, africtionbrake member capable of being shifted to engage and release saidrecord-table, spaced contact-members of an electric-circuit controllingswitch, a spring acting to shift said friction-brake member fromrecord-table engaging position, and means for bridging said spacedcontact-members to close the electric-circuit upon shifting of saidfriction-brake member under the action of said spring to release therecord-table.

7. In a sound-reproducing apparatus having a rotatable record-table anda swinging rtone-arm, a friction-brake member capable of beingr shiftedto engage and release said record-table, spaced contact-members of anelectric-circuit controlling switch, a spring acting to shift saidfriction-brake member from record-table engaging position, means forbridging said spaced contact-members to close the electric-circuit uponshifting of said friction-brake member under the action of .said springto release the recordtable, and means rendered effective by in-v wardmovement of said tone-arm for shifting said friction-brake member toengage said record-table and open said electriccircuit.

In testimony whereof, I have signed my name to this specification.

- v EMIL TRAUB.

